EP0347307A3 - Coding method and linear prediction speech coder - Google Patents

Coding method and linear prediction speech coder Download PDF

Info

Publication number
EP0347307A3
EP0347307A3 EP19890401644 EP89401644A EP0347307A3 EP 0347307 A3 EP0347307 A3 EP 0347307A3 EP 19890401644 EP19890401644 EP 19890401644 EP 89401644 A EP89401644 A EP 89401644A EP 0347307 A3 EP0347307 A3 EP 0347307A3
Authority
EP
European Patent Office
Prior art keywords
filtering
frame
vector
vectors
speech signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19890401644
Other languages
French (fr)
Other versions
EP0347307B1 (en
EP0347307A2 (en
Inventor
Michel Lever
Marc Delprat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nortel Networks France SAS
Original Assignee
Matra Communication SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matra Communication SA filed Critical Matra Communication SA
Publication of EP0347307A2 publication Critical patent/EP0347307A2/en
Publication of EP0347307A3 publication Critical patent/EP0347307A3/en
Application granted granted Critical
Publication of EP0347307B1 publication Critical patent/EP0347307B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/005—Correction of errors induced by the transmission channel, if related to the coding algorithm
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/10—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a multipulse excitation
    • G10L19/113—Regular pulse excitation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L2019/0001—Codebooks
    • G10L2019/0003—Backward prediction of gain
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L2019/0001—Codebooks
    • G10L2019/0013—Codebook search algorithms
    • G10L2019/0014—Selection criteria for distances
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • G10L25/06—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being correlation coefficients

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

The method, usable in particular for low-rate speech transmission, uses vector excitation. A signal frame is represented, on the one hand, by prediction parameters, and on the other hand, by a succession of excitation vectors contained in a dictionary (20) and by amplification gains (Gk) of these vectors, the vectors adopted being determined by searching for the minimum energy of an error signal obtained by subtraction of each vector in its turn, after having submitted to a filtering, from the frame of the speech signal. Before subtraction: each frame of the speech signal is subjected to a short-term analysis filtering and to a weighted synthesis filtering, with coefficients possibly fixed in time, and the amplified vector is subjected to a long-term predictive filtering and to the same perceptual weighted synthesis filtering as the speech signal. <IMAGE>
EP89401644A 1988-06-13 1989-06-13 Coding method and linear prediction speech coder Expired - Lifetime EP0347307B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8807846 1988-06-13
FR8807846A FR2632758B1 (en) 1988-06-13 1988-06-13 LINEAR PREDICTION SPEECH CODING AND ENCODING METHOD

Publications (3)

Publication Number Publication Date
EP0347307A2 EP0347307A2 (en) 1989-12-20
EP0347307A3 true EP0347307A3 (en) 1990-12-27
EP0347307B1 EP0347307B1 (en) 1994-05-04

Family

ID=9367205

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89401644A Expired - Lifetime EP0347307B1 (en) 1988-06-13 1989-06-13 Coding method and linear prediction speech coder

Country Status (4)

Country Link
EP (1) EP0347307B1 (en)
DE (1) DE68915057T2 (en)
ES (1) ES2052043T3 (en)
FR (1) FR2632758B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69131779T2 (en) * 1990-12-21 2004-09-09 British Telecommunications P.L.C. VOICE CODING
ES2042410B1 (en) * 1992-04-15 1997-01-01 Control Sys S A ENCODING METHOD AND VOICE ENCODER FOR EQUIPMENT AND COMMUNICATION SYSTEMS.
FR2720849B1 (en) * 1994-06-03 1996-08-14 Matra Communication Method and device for preprocessing an acoustic signal upstream of a speech coder.
CN101615394B (en) 2008-12-31 2011-02-16 华为技术有限公司 Method and device for allocating subframes

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989002147A1 (en) * 1987-08-28 1989-03-09 British Telecommunications Public Limited Company Speech coding

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989002147A1 (en) * 1987-08-28 1989-03-09 British Telecommunications Public Limited Company Speech coding

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
ELECTRONICS LETTERS, vol. 25, no. 6, 16 mars 1989, pages 401-403, Stevenage GB; R.A. SALAMI: "Binary code excited linear prediction (BCELP): new approach to CELP coding of speech without codebooks" *
ICASSP'85 PROCEEDINGS - IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, 26-29 mars 1985, Tampa, Florida, vol. 3, pages 965-968, IEEE, New York, US; E.F. DEPRETTERE et al.: "Regular excitation reduction for effective and efficient LP-coding of speech" *
ICASSP'86 PROCEEDINGS - IEEE-IECEJ-ASJ INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSNG, 7-11 avril 1986, Tokyo, vol. 4, pages 3055-3058, IEEE, New York, US; G. DAVIDSON et al.: "Complexity reduction methods for vector excitation coding" *
PROCEEDINGS: ICASSP'87 - 1987 INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, 6-9 avril 1987, Dallas, Texas, vol. 4, pages 1957-1960, IEEE, New York, US; J.-P. ADOUL et al.: "Fast CELP coding based on algebraic codes" *

Also Published As

Publication number Publication date
ES2052043T3 (en) 1994-07-01
FR2632758A1 (en) 1989-12-15
DE68915057D1 (en) 1994-06-09
EP0347307B1 (en) 1994-05-04
EP0347307A2 (en) 1989-12-20
DE68915057T2 (en) 1994-08-18
FR2632758B1 (en) 1991-06-07

Similar Documents

Publication Publication Date Title
TR199501637A2 (en) Method for encoding an audio signal.
AU1838488A (en) Code excited linear predictive vocoder and method of operation
JPS6440899A (en) Cord excitation linearity prediction vocoder using false search
KR100304682B1 (en) Fast Excitation Coding for Speech Coders
DE69125775D1 (en) Speech coding and decoding system
CA2429832A1 (en) Lpc vector quantization apparatus
EP0501420A3 (en) Speech coding method and system
JPH10187196A (en) Low bit rate pitch delay coder
DE69013738D1 (en) Speech coding device.
EP0462558A3 (en) Speech coding system
DE68913691D1 (en) Speech coding and decoding system.
CA2110645A1 (en) Method of and Device for Quantizing Excitation Gains in Speech Coders Based on Analysis-By-Synthesis Techniques
AU6230199A (en) Celp voice encoder
CA2005115A1 (en) Low-delay code-excited linear predictive coder for speech or audio
EP0347307A3 (en) Coding method and linear prediction speech coder
EP0658877A2 (en) Speech coding apparatus
EP1355298A3 (en) Code Excitation linear prediction encoder and decoder
DE69624207D1 (en) Speech encoder with device for estimating the deviation of the power curve of a synthetic signal from an input signal
Sheikh et al. Real-time implementation and optimization of ITU-T's G. 729 speech codec running at 8 kbits/sec using CS-ACELP on TM-1000 VLIW DSP CPU
JP2898377B2 (en) Code-excited linear prediction encoder and decoder
CA2118986C (en) Speech coding system
DK0469997T3 (en) Method of coding and speech codes for analysis by synthesis
TW245858B (en) Method and device for codebook excitation encoding
JPH0683393A (en) Speech encoding device

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE ES GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE ES GB IT

17P Request for examination filed

Effective date: 19901221

17Q First examination report despatched

Effective date: 19930126

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES GB IT

REF Corresponds to:

Ref document number: 68915057

Country of ref document: DE

Date of ref document: 19940609

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19940516

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2052043

Country of ref document: ES

Kind code of ref document: T3

ITF It: translation for a ep patent filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20040608

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20040609

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20040611

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050613

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050613

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050614

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060103

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20050613

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20050614